![RNZ: This Way Up show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/011/584/small/this-way-up-with-simon-morton.jpg)
Summary: Dean M. Anderson is working on invisible 'virtual fencing' uses a mix of GPS and electric shocks to keep your stock where you want them.
Summary: Dean M. Anderson is working on invisible 'virtual fencing' uses a mix of GPS and electric shocks to keep your stock where you want them.